Has anyone tried boring out the center of the shaft of a NEMA 17 stepper motor? I was thinking of trying this to make a simpler extruder, to cut down on the size of the X-carriage platform on my prusa-mendel machine. I realize the firmware would change - that's ok.

The question is - if I start boring a 1.75mm or 3mm hole into the shaft, am I going to run into any magnets or electronics on the inside of the motor, or will I simply poke through the other side?

... search for hollow shaft stepper motors ...

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Viktor
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@Wissing So 9 years on... do you remember why you wanted a hollow shaft? I am looking for examples of people suggesting running filament through the shaft of a motor and into the extruder. Any mention in a public forum before FuseLabs patented the idea for their extruder would be good.